Table 2 Linear mixed models testing for diverging trait
values in N=160 genotypes originating from four sites along a natural
rainfall gradient (including control plots only), when grown under five
water levels in the greenhouse. For site, posthoc results are provided
to identify diverging sites (arid, semi-arid, Mediterranean,
mesic-Mediterranean). Highlighted in bold are traits where trait
divergence between sites followed a cline along the rainfall gradient.
Note that residual df are Kenward-Roger approximated and can therefore
differ among models; 13C isotopes were measured in only 56 genotypes.